Blue-milk outlet in centrifugal separators.



A. GHRISTENSON. BLUE MILK OUTLET IN CBNTBIFUGAL SEPARATORS.

APPLIOATION FILED APR. 29, 1907.

Patented Oct 4, 1910.

- spreaders may of the passage,

outlet is, therefore,

ALGO'J. LEVIN CHRISTENSON, OF STOCKHOLM,

SWEDEN.

BLUE-MILK OUTLET IN CENTRIFIIGAL SEPARATORS.

I Specification of Letters Patent Application filed April 29, 1907. Serial No. 370,850.

. milk it is of importance that the ejected jet of milk is of the least possible density so that it does not offer any great; resistance to the surrounding air but easily turns aside for the same. It has been tried to gain this result by dividing the outlet in a plurality of passages or by making the outlets in the form of horizontal slits in order to, thereby, decrease the density of the out-flowing jet or jets. If, however, a screw for regulating the size of the outlet is placed therein, which is often the case, the said arrangements are not at once applicable, inasmuch as the width of the outlet is, thereby, dependent of the diameter of the milk screw, which diameter cannot be extended beyond a certain limit.

The present invention has for its object to make it possible to provide, in outlets with milk screw, an extended outlet for the said purpose.

The invention consists, chiefly, in providing one or more passages or outflow-openings extending from the groove in which the screw enters, said passages or openings having a larger cross-section than the said groove. The passage or outlet'opening suitably widens outwardly. and the widening can be obtained in such a manner that the outer outlet opening is given the form of a horizontal slit. In order to cause the milk to completely spread in the widened passage, so as to fill the outer mouth, one or more be inserted in the inner part or the passage may, in itself. have an oblique downwardlyso that the milk meeting the oblique surface is caused to spread in a horizontal direction and till up the outlet opening. kind,the oblique spreading planes must have a considerably large extension in radial direction, the metal should be thickened in the part, where the outlet is arranged The groove with the screw as well as the widened suitably arranged for upper part blue milk direction upwardly on Inasmuch as, in an outlet ofthe saidinstance in the nut situated at the top of the drum, said nut having usually the desired thickness, or the neck of the drum or, the mantle is especially thickened; The thickened part, if such is needed, cannot advantageously be made in or other projecting part or if placed outwardly, resistance to the air and, placed at the interior, it causes inconveniences in the manufacturin According to this in *:.1tion the thickened part is, therefore, made in the form of-an annular flange of a suitable cross-section placed exteriorly. or interiorly, or made integral with the drum. In the drawing I have shown by way of example. some embodiments of an outlet of the said kind.

Figure l is a central vertical section of the of a centrifugal drum having a outlet embodying the invention formed'in the 'uppernut of the drum. Fig. 2 is a horizontal section of'the same drum showing the outlet in plan. Fig. 3 is a front view of the said outlet. Figs. 4, and 6 are similar views of a second form of construction in which the outlet is formed in the upper part of the neck of the drum. Fig. 7 is a central vertical section of. the upper part of a centrifugal drum showing an embodiment of the outlet in which the upper side thereof is formed by the slanting lower side of the nut. Fig. 8 is a horizontal section of the upper part of a centrifugal drumhaving the outlet formed by a number of passages shoulder, since,

1 extending radially from a groove in theneck of the drum.

Referring to Figs. 1, 2 and 3, the outlet. is placed in the nutl joining the parts of the centrifugal drum. The nut 1 is screwed on the central tubeQ and bears, in the manner illustratedin the drawing, on the outer cap 3 as well as on the extension 5 of the upper plate 4: surrounding the tube 2. The cream rising inside the said'extension enters in a known manner through the opening 6 into the annular space 7 and thence through the opening 8. The blue milk rising at the outer side of the upper plate escapes through the blue milk outlet forming the subject matter of this invention. .This outlet is arranged in the interior of the nutl. and is downwardly formed by the groove 8,-the width of which is regulated by the screw 9 insertedtherein from without. so as. to make the form of a nipple.

it causes a considerable Patented Oct. 4,1910.

it rar ibl e to regulate the quantity of'milk spreader: In order to cause the rising milk other form' such that its inner edge .is siturunning through the said groove. Extendl ing from above the screw 9 is the widened outlet 10 having the form indicated in Figs. 2 and 3. .The side-walls of the outlet thus extend from the sides of the'groove 8 in a direction extending obliquely outwardly, 1 whereby the outlet seen from withoutsuitably obtains the form of a horizontal slit, as shown in Fig. 3. In order to cause the milk rising through the groove 8 to spread toward the sides in the outlet 10 and completely fill the extended horizontal outlet 0 ening, the lower side of the outlet is made 's ant-ing upwardly, as shown in the drawing. The milk actuated by the centrifugal force arrives at the slanting plane and is caused by the latter to spread, as will be easily understood.-

According to the embodimentillustrated and above described the outlet widens symmetrically toward both sides of the groove 8 but, if preferred, the widened part may be located at one side only. It is, further, obvious that the outlet opening proper need not have the form of a horizontal slit but ma be formed in any other suitable manner.

eferring to Figs. 4:, 5 and 6, the boss 11 containing the outlet 10 is situated in the upper part of the cap or neck 3 of the centrifugal drum. The cream outlet is in this case formed in a known manner by two coinciding openings 12 and 13 in the extension of the upper plate land the neck of the drum. The milk outlet arranged according to this invention has in this case a direction extending obliquely from the top downward, when followed frornwithin outwardly, the upper oblique surface in this case serving as a to meet the said upper surface the lower surface-should, suitably, be sloping or have an ated sufliciently above the outer, lower edge of the upper surface.

Referring to Fig. 7, the lower side of the nut 1 forms the slanting surface of the outlet 10 necessary for the spreading. The said side of the nut is, namely, formed conical in shape, as shown in the drawing, and bears on the correspondingly shaped upper edge of the cap or neck 3 of the drum. Cut in the forming the outwardly widened outlet 10. This constructional form is especially practical. onaccount of the facility of manufacturing same.

The invention might also be carried out as shown in Fig. 8 which illustrates a number of bored or otherwise formed passages ll extending radially from the groove 8, said passages being also adapted to produce the desired spreading and distribution, though notin such a degree asthose hereinbefore described forming a continuous space,

Each embodiment illustrated comprises a throwing-off flange 15 situated immediately below the outlet for causing the milk to better slip from the outer side of the drum. Such an annular flange may also be situated above the outlet opening lO'so that a channel is formed between the said flange and the lower one 15.- Through the action of the centrifugal force a considerable vacuum arises in the said channel, said vacuum facilitating the streaming of the milk through the opening 10 and its spreading in the channel. v

The slanting surfaces of the outlet need not be smooth, as illustrated in the drawing, but may as well be broken or sinuous or otherwise so formed that the spreading of the milk will be as complete as possiblt Having now described my invention, what I claim as new and desire to secure by Letters Patent is 1. The combination with a centrifugal drum having an outlet. of a regulating screw entering the inner part of the said outlet, and a part forming. beyond the said screw, an outer part of the outlet which is wider than the inner one. whereby the fluid spreads out in the said outer part of the outlet, before leaving the drum. tubstantiall v as and for the purpose set forth.

2. The combination with a centrifugal drum having an outlet, of regulating means situated in the inner part of the said outlet, and means for causing the fluid to spread in the outer part of the said outlet, substantially as and for the purpose set forth.

'3, The combination with a centrifugal drum having an outlet, of regulating means adapted to be moved into and out from the. inner part of the said outlet, and fluid spreaders situated within a widened outer part of the said outlet, substantially as and for the purpose set forth.

i. The combination with a centrifugal drum having an outlet in the neck thereof, of a screw entering the said outlet, and a thickened part having an. outwardly widening outlet opening extending from the outlet in the neck of the drum, substantially as and for the purpose set forth.

5.- The combination with a centrifugal drum having an outlet in the neck thereof, of a screw entering the said outlet, the outer part of the said outlet forming a plurality of passages, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALGOT LEVIN onnistri ntson. Witnesses i SIeURo DAHL, ERIK PUNDBER 

